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Re: Help with PMDD
I had trouble with this posting so please forgive me if this is a duplicate.
I'm going to try making PMDD for the first time and need some advice from
the less chemically challenged members of the group. I have a 20 gallon
tank, heavily planted with a Flourite substrate. Light is provided by power
compacts (55 watts). CO2 is provided by yeast. Unfortunately I do not have
any test kits so I will use smaller doses and observation of the plants.
Currently plant growth is not very good. My Amazon sword occasionally sends
up a bright yellow leaf and the new leaves on my stem plants (not sure of
the species; light green and red) are very thin and narrow instead of the
tear drop shaped older growth.
The PMDD formula I plan to use is:
1 Tbsp chelated trace element mix
2 Tsp K2SO4 (potassium sulfate)
1 Tsp KNO3 (potassium nitrate)
2.5 Tbsp MgSO4.7H2o (hydrated magnesium sulfate; aka epsom salts)
300mL distilled water
I had trouble locating K2SO4 (All Green is not sold in this area), but
instead purchased a lifetime supply of Sulfate of Potash which lists a
guaranteed analysis of Soluble Potash (K2O) 50%, Sulfur (S) 17%. How should
I adjust the above PMDD formula for this substitution?
For the trace element mix I purchased 5 lbs of Microplex made by Miller
Chemical & Fertilizer Corp. This mix is a little different than the mix
mentioned on The Krib and lists the following content: Mg 5.43%, B 0.5%, Co
0.05%, Cu 1.5%, Fe 4%, Mn 4%, Mo 0.1%, Zn 1.5%. I am a little concerned
about the 1.5% chelated copper. Do any of you think this will be a problem?
Since this mix has 5.43% Mg should I eliminate the epsom salts when using
As an alternative to the use of the above mix, I am considering the use of a
product that I purchased for my lawn, however I do not know what dilution
and dosage to use or what problems it may introduce. This product is a
liquid called Iron Combo-Chelate made by Baicor, Inc. of Logan, Utah. This
liquid has an analysis of: Total Nitrogen 1% (urea nitrogen), Soluble Potash
2%, Sulfur 1%, Boron 0.2%, Copper 0.2%, Iron 4.5%, Manganese 1%, Zinc 1%.
The Cu, Fe, Mn and Zn are all chelated. I would appreciate any ideas or
comments from list members on using this product, mix ratios with other PMDD
ingredients, potential problems and possible dosage levels.
In Salt Lake City - home the the Aging Utah Jazz and the Olympic bribery